Re: [Xen-devel] [patch] xen udev rule interfering with openvpn

[Teck Choon Giam <giamteckchoon@xxxxxxxxx>]

SNAP

> +++ b/tools/libxl/libxl_dm.c    Tue Apr 17 11:26:06 2012 +0100
> @@ -212,9 +212,9 @@ static char ** libxl__build_device_model
>                 char *ifname;
>                 if (!vifs[i].ifname)
>                     ifname = libxl__sprintf(gc,
> -                                            "tap%d.%d", domid, 
> vifs[i].devid);
> +                                            "xentap%d.%d", domid, 
> vifs[i].devid);
>                 else
> -                    ifname = vifs[i].ifname;
> +                    ifname = libxl__sprintf(gc, "xentap-%s", vifs[i].ifname);

To my understanding, you set ifname to prefix xentap instead of tap
for type LIBXL_NIC_TYPE_IOEMU which is for hvmdomain.  So please read
my comments below related to tools/python/xen/xend/image.py

>                 flexarray_vappend(dm_args,
>                                 "-net", libxl__sprintf(gc, 
> "nic,vlan=%d,macaddr=%s,model=%s",
>                                                        vifs[i].devid, smac, 
> vifs[i].model),
> @@ -451,10 +451,10 @@ static char ** libxl__build_device_model
>                                 LIBXL_MAC_FMT, LIBXL_MAC_BYTES(vifs[i].mac));
>                 char *ifname;
>                 if (!vifs[i].ifname) {
> -                    ifname = libxl__sprintf(gc, "tap%d.%d",
> +                    ifname = libxl__sprintf(gc, "xentap%d.%d",
>                                             guest_domid, vifs[i].devid);
>                 } else {
> -                    ifname = vifs[i].ifname;
> +                    ifname = libxl__sprintf(gc, "xentap-%s", vifs[i].ifname);
>                 }
>                 flexarray_append(dm_args, "-device");
>                 flexarray_append(dm_args,
> diff -r 8d92d1f34921 -r de3e65d804cc tools/python/xen/xend/image.py
> --- a/tools/python/xen/xend/image.py    Mon Apr 16 17:57:00 2012 +0100
> +++ b/tools/python/xen/xend/image.py    Tue Apr 17 11:26:06 2012 +0100
> @@ -921,7 +921,7 @@ class HVMImageHandler(ImageHandler):
>             if vifname:
>                 vifname = "tap-" + vifname

The above shouldn't it be:

vifname = "xentap-" + vifname

For your libxl related is:

ifname = libxl__sprintf(gc, "xentap-%s", vifs[i].ifname);

Sorry if my thinking is wrong please correct me.

Thanks.

Kindest regards,
Giam Teck Choon


>             else:
> -                vifname = "tap%d.%d" % (self.vm.getDomid(), nics-1)
> +                vifname = "xentap%d.%d" % (self.vm.getDomid(), nics-1)
>             ret.append("-net")
>             ret.append("tap,vlan=%d,ifname=%s,bridge=%s" %
>                        (nics, vifname, bridge))
>
>
>
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